两种来源狗牙根的生长对铜污染土壤酶活性的影响  

Effects of growth of Cynodon dactylon from two sources on enzyme activities of soil polluted by copper

作　　者：王友保[1] 蒋田华[1] 安雷[1] 姚婧[1] 黄永杰[1] 

机构地区：[1]安徽师范大学生命科学学院,安徽芜湖241000

出　　处：《草业学报》2008年第6期40-46,共7页Acta Prataculturae Sinica

基　　金：国家自然科学基金(30470270);安徽省高校自然科学基金重点项目(2006KJ059A);重要生物资源利用与保护研究安徽省重点实验室基金;安徽省高校生物环境与生态安全省级重点实验室基金;安徽省高校骨干教师基金和安徽师范大学博士基金项目资助

摘　　要：研究了2种来源狗牙根的生长对Cu污染土壤酶活性的影响。结果表明,随着Cu污染程度的增加,土壤过氧化氢酶、脲酶、蔗糖酶、磷酸酶、多酚氧化酶活性均逐渐减少,与Cu浓度呈高度负相关。随培养时间的延长,各处理组土壤酶活性均得到不同程度的恢复,但仍然低于对照;种植狗牙根能有效降低Cu污染对土壤酶活性的抑制作用,各处理组土壤酶活性均极显著增加;其中来源于污染区的狗牙根作用效果更加显著;5种土壤酶的活性均与狗牙根干重呈正相关,并且与狗牙根地下部分干重的相关性大于地上部分。脲酶活性对土壤Cu污染敏感性高,可以作为土壤Cu污染的监测指标之一。The effects of growth of Cynodon dactylon from two sources on enzyme activities in soils polluted by copper was studied in pot cultivation experiments. With higher Cu concentrations, the activities of catalase, utease, invertase, phosphatase, and polyphenoloxidase gradually decreased. There was a significant negative correlation between Cu concentration and soil enzyme activities. C. dactylon reduced the inhibition of Cu on the activities of catalase, urease, invertase, phosphatase and polyphenoloxidase from cultivated C. dactylon. Among them, the function of C. dactylon from polluted areas was greater than that from unpolluted areas, and the enzyme activities had a positive correlation to dry weight of C. dactylon. Urease activity may be a monitoring index for Cu polluted soil and one of the appraisal indexes of phytoremediation effects for Cu polluted soil.

关 键 词：铜 狗牙根 生长 土壤酶 

分 类 号：S688.4[农业科学—观赏园艺]